Federal investigators are searching for a Howard University dental student and four other missing Muslim men reported missing from the Washington, D.C. area, the Investigative Project on Terrorism (IPT) has learned. There is concern they may have been sent abroad to train for jihad. The five were last seen November 29.

The identities of two of the missing men, Howard student Ramy Zamzam and Waqar Khan, have been mentioned in online postings, including a Facebook page that was set up Monday for friends to offer their support. Some of those pages, however, appear restricted to friends and associates.

It is not clear where the men are believed to have gone, but an informed source told the IPT that at least one left behind a farewell video.